import turtle,math
from UsefulTurtleFunctions import *

turtle.hideturtle()

drawLine(-200,0,200,0)
drawLine(190,10,200,0)
drawLine(200,0,190,-10)


drawLine(0,-70,0,70)
drawLine(-10,60,0,70)
drawLine(0,70,10,60)


def x_x():
    turtle.penup()
    turtle.goto(-10, 100)
    turtle.pendown()
    for x in range(-10, 11):
        y = x * x
        turtle.goto(x, y)

x_x()

turtle.done()